The Pigskin Index is
designed to give a quick comparison of the relative strength of all covered teams. To see
how a game should turn out, simply compare the ratings of the competing teams and add 3
points to the home team. For example, a visiting team with a rating of 140 should be 7
points stronger than a home team with a rating of 130. 140 - (130 + 3) = 7. In neutral
field games (such as the Super Bowl), no home team advantage may be appropriate.